1 /*
2  * Copyright (C) 2015 The Android Open Source Project
3  *
4  * Licensed under the Apache License, Version 2.0 (the "License");
5  * you may not use this file except in compliance with the License.
6  * You may obtain a copy of the License at
7  *
8  *      http://www.apache.org/licenses/LICENSE-2.0
9  *
10  * Unless required by applicable law or agreed to in writing, software
11  * distributed under the License is distributed on an "AS IS" BASIS,
12  * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
13  * See the License for the specific language governing permissions and
14  * limitations under the License.
15  */
16 package com.android.settings.applications;
17 
18 import android.Manifest;
19 import android.app.AppOpsManager;
20 import android.content.Context;
21 
22 import com.android.settingslib.applications.ApplicationsState;
23 import com.android.settingslib.applications.ApplicationsState.AppEntry;
24 import com.android.settingslib.applications.ApplicationsState.AppFilter;
25 
26 import java.util.ArrayList;
27 import java.util.List;
28 
29 /*
30  * Connects info of apps that draw overlay to the ApplicationsState. Wraps around the generic
31  * AppStateAppOpsBridge class to tailor to the semantics of SYSTEM_ALERT_WINDOW. Also provides app
32  * filters that can use the info.
33  */
34 public class AppStateOverlayBridge extends AppStateAppOpsBridge {
35 
36     private static final String TAG = "AppStateOverlayBridge";
37     private static final int APP_OPS_OP_CODE = AppOpsManager.OP_SYSTEM_ALERT_WINDOW;
38     private static final String PM_SYSTEM_ALERT_WINDOW = Manifest.permission.SYSTEM_ALERT_WINDOW;
39     private static final String[] PM_PERMISSION = {
40             PM_SYSTEM_ALERT_WINDOW
41     };
42 
AppStateOverlayBridge(Context context, ApplicationsState appState, Callback callback)43     public AppStateOverlayBridge(Context context, ApplicationsState appState, Callback callback) {
44         super(context, appState, callback, APP_OPS_OP_CODE, PM_PERMISSION);
45     }
46 
47     @Override
updateExtraInfo(AppEntry app, String pkg, int uid)48     protected void updateExtraInfo(AppEntry app, String pkg, int uid) {
49         app.extraInfo = getOverlayInfo(pkg, uid);
50     }
51 
getOverlayInfo(String pkg, int uid)52     public OverlayState getOverlayInfo(String pkg, int uid) {
53         PermissionState permissionState = super.getPermissionInfo(pkg, uid);
54         return new OverlayState(permissionState);
55     }
56 
57     // TODO: figure out how to filter out system apps for this method
getNumberOfPackagesWithPermission()58     public int getNumberOfPackagesWithPermission() {
59         return super.getNumPackagesDeclaredPermission();
60     }
61 
62     // TODO: figure out how to filter out system apps for this method
getNumberOfPackagesCanDrawOverlay()63     public int getNumberOfPackagesCanDrawOverlay() {
64         return super.getNumPackagesAllowedByAppOps();
65     }
66 
67     public static class OverlayState extends AppStateAppOpsBridge.PermissionState {
68         public final boolean controlEnabled;
69 
70         private static final List<String> DISABLE_PACKAGE_LIST = new ArrayList<>();
71 
72         static {
73             DISABLE_PACKAGE_LIST.add("com.android.systemui");
74         }
75 
OverlayState(PermissionState permissionState)76         public OverlayState(PermissionState permissionState) {
77             super(permissionState.packageName, permissionState.userHandle);
78             this.packageInfo = permissionState.packageInfo;
79             this.appOpMode = permissionState.appOpMode;
80             this.permissionDeclared = permissionState.permissionDeclared;
81             this.staticPermissionGranted = permissionState.staticPermissionGranted;
82             controlEnabled = !DISABLE_PACKAGE_LIST.contains(permissionState.packageName);
83         }
84     }
85 
86     public static final AppFilter FILTER_SYSTEM_ALERT_WINDOW = new AppFilter() {
87         @Override
88         public void init() {
89         }
90 
91         @Override
92         public boolean filterApp(AppEntry info) {
93             return info.extraInfo != null;
94         }
95     };
96 }
97